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Balahmar, Ahmad Riyadh Umar and Eni, Rustianingsih and ilmi, usrotin choiriyah and Sukmana, Hendra and Totok, Wahyu Abadi GEOPARK LUMPUR INVESTMENT DEVELOPMENT SIDOARJO EAST JAVA INDONESIA. Journal of Legal, Ethical and Regulatory Issues, 24. pp. 1-7. ISSN 1544-0044